“After the disturbance had ended, Paul sent for the disciples, and after encouraging them and saying farewell, he left to go to Macedonia.”
After surviving a mob in Ephesus, Paul moves on. His last act is to encourage the disciples and say goodbye. It is a deliberate act. Greetings and farewells were important acts in first-century faith.
Greetings and farewells (in Greek, the same word) are not perfunctory functions, but moment to “spend time in warm exchange” (BGAD). How are your skills in this area?